How should you interpret a label’s instruction when it lists a higher REI for certain plant species?

• A. REI is not specified on labels
• B. REI can vary by crop; follow the highest required REI on label; do not re-enter earlier than that period unless PPE or label allowances change
• C. REI is always the same for all crops
• D. Follow the lowest REI on label

Answer: (B)

The key idea is safety through crop-specific restrictions. REI is the minimum time you must wait after a pesticide is applied before entering the treated area unless you’re using approved PPE or the label explicitly allows an earlier entry. When a label shows a higher REI for certain plant species, that longer interval applies to entry into that crop’s area. You should follow the most restrictive instruction—the highest REI listed on the label for that crop—because residues and exposure risk can differ by crop, and the label’s higher value reflects the safer, conservative requirement. You may be allowed to re-enter sooner only if the label states that PPE or other allowances can modify the REI; otherwise, wait the stated interval. REI varies by crop and is not always the same for all crops, and following the lowest REI would underprotect workers.